How do I delete everything in Redis?

you can use flushall in your terminal

redis-cli> flushall

Open redis-cli and type:

FLUSHALL

redis-cli -h <host> -p <port> flushall

It will remove all data from client connected(with host and port)

You can use FLUSHDB

e.g

List databases:

127.0.0.1:6379> info keyspace
# Keyspace

List keys

127.0.0.1:6379> keys *
(empty list or set)

Add one value to a key

127.0.0.1:6379> lpush key1 1
(integer) 1
127.0.0.1:6379> keys *
1) "key1"
127.0.0.1:6379> info keyspace
# Keyspace
db0:keys=1,expires=0,avg_ttl=0

Create other key with two values

127.0.0.1:6379> lpush key2 1
(integer) 1
127.0.0.1:6379> lpush key2 2
(integer) 2
127.0.0.1:6379> keys *
1) "key1"
2) "key2"
127.0.0.1:6379> info keyspace
# Keyspace
db0:keys=2,expires=0,avg_ttl=0

List all values in key2

127.0.0.1:6379> lrange key2 0 -1
1) "2"
2) "1"

Do FLUSHDB

127.0.0.1:6379> flushdb
OK

List keys and databases

127.0.0.1:6379> keys *
(empty list or set)
127.0.0.1:6379> info keyspace
# Keyspace

Your questions seems to be about deleting entire keys in a database. In this case you should try:

1. Connect to redis. You can use the command redis-cli (if running on port 6379), else you will have to specify the port number also.
2. Select your database (command select {Index})
3. Execute the command flushdb

If you want to flush keys in all databases, then you should try flushall.

you can use following approach in python

def redis_clear_cache(self):

    try:
        redis_keys = self.redis_client.keys('*')
    except Exception as e:
        # print('redis_client.keys() raised exception => ' + str(e))
        return 1

    try:
        if len(redis_keys) != 0:
            self.redis_client.delete(*redis_keys)
    except Exception as e:
        # print('redis_client.delete() raised exception => ' + str(e))
        return 1

    # print("cleared cache")
    return 0

This works for me: redis-cli KEYS \* | xargs --max-procs=16 -L 100 redis-cli DEL

It list all Keys in redis, then pass using xargs to redis-cli DEL, using max 100 Keys per command, but running 16 command at time, very fast and useful when there is not FLUSHDB or FLUSHALL due to security reasons, for example when using Redis from Bitnami in Docker or Kubernetes. Also, it doesn't require any additional programming language and it just one line.

If you want to clear redis in windows: find redis-cli in

C:\Program Files\Redis and run FLUSHALL command.

Its better if you can have RDM (Redis Desktop Manager). You can connect to your redis server by creating a new connection in RDM.

Once its connected you can check the live data, also you can play around with any redis command.

Opening a cli in RDM.

1) Right click on the connection you will see a console option, just click on it a new console window will open at the bottom of RDM.

Coming back to your question FLUSHALL is the command, you can simply type FLUSHALL in the redis cli.

Moreover if you want to know about any redis command and its proper usage, go to link below. https://redis.io/commands.

There are different approaches. If you want to do this from remote, issue flushall to that instance, through command line tool redis-cli or whatever tools i.e. telnet, a programming language SDK. Or just log in that server, kill the process, delete its dump.rdb file and appendonly.aof(backup them before deletion).

If you are using Java then from the documentation, you can use any one of them based on your use case.

/**
 * Remove all keys from all databases.
 *
 * @return String simple-string-reply
 */
String flushall();

/**
 * Remove all keys asynchronously from all databases.
 *
 * @return String simple-string-reply
 */
String flushallAsync();

/**
 * Remove all keys from the current database.
 *
 * @return String simple-string-reply
 */
String flushdb();

/**
 * Remove all keys asynchronously from the current database.
 *
 * @return String simple-string-reply
 */
String flushdbAsync();

Code:

RedisAdvancedClusterCommands syncCommands = // get sync() or async() commands 
syncCommands.flushdb();

Read more: https://github.com/lettuce-io/lettuce-core/wiki/Redis-Cluster

For anyone wondering how to do this in C# it's the same as the answer provided for Python for this same question.

I am using StackExchange.Redis v2.2.88 for a dot net (core) 5 project. I only need to clear my keys for integration testing and I have no purpose to do this in production.

I checked what is available in intellisense and I don't see a stock way to do this with the existing API. I imagine this is intentional and by design. Luckily the API does expose an Execute method.

I tested this by doing the following:

1. Opened up a command window. I am using docker, so I did it through docker.

2. Type in redis-cli which starts the CLI

3. Type in KEYS * and it shows me all of my keys so I can verify they exist before and after executing the following code below:

   //Don't abuse this, use with caution var cache = ConnectionMultiplexer.Connect( new ConfigurationOptions { EndPoints = { "localhost:6379" } });

   var db = _cache.GetDatabase();

   db.Execute("flushdb");

4. Type in KEYS * again and view that it's empty.

Hope this helps anyone looking for it.